Tab Session Manager by sienori

Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

• Save and restore windows and tabs
• Manage sessions with name and tags
• Auto save when window is closed
• Auto save at regular intervals
• Import and export sessions
• Compatibility with Chrome extension
• Cloud sync
• Support tab groups

Chrome version:
https://chrome.google.com/webstore/detail/tab-session-manager/iaiomicjabeggjcfkbimgmglanimpnae
Edge version:
https://microsoftedge.microsoft.com/addons/detail/jkjjclfiflhpjangefhgfjhgfbhajadk

USERS:

• Since updating to version 3.0.0, there is a problem that the session list can not be opened. Please see here for solutions. https://github.com/sienori/Tab-Session-Manager/wiki/IndexedDB-Error
• Vote on Mozilla website for APIs/bug fixes needed by session managers, so they can be better. https://github.com/sienori/Tab-Session-Manager/issues/364

Version 6.8.0

• Added option to compress favicons when saving session
  • Compresses the favicon URL of the data URI scheme.
  • This will reduce the session size and speed up loading.
  • You can also compress the favicons of past sessions.
• Added option to select the backup type
  • You can select individual or full backup
• Fixed an issue where session list loading was missing
• Fixed an issue where session list filtering was reset
• Fixed an issue where memory was not released after exporting sessions

Version 6.7.0

• Renewed local backup option
  • Supports incremental backups.
  • Only sessions that have changed will be saved separately, saving storage.
• Fixed an issue where the cloud sync login prompt appears on every reboot (Chrome/Edge)
  • If you are using multiple browsers, the issue will be resolved only in the first Chrome/Edge you logged in.
  • The second or later logged-in Chrome/Edge will still show the login prompt.
  • Firefox does not have this issue.
• Improved the open and delete buttons in the session list
  • Fixed an issue of accidentally opening a session by repeatedly clicking the delete button.

Version 6.6.0

• Supported for saving and restoring tab groups (in Chrome)
  • To save tab groups, you need to install an additional extension.
• Supported for restoring window title (in Firefox)
• Fixed an issue where sessions could not be registered to startup

Version 6.5.0

• Added auto-sync option for cloud sync
• Changed to show cloud sync account names on the settings page
• Changed to wait 30 seconds when executing backup on startup
• Implemented suggestions for tag input
• Implemented double-click to open session
• Fixed broken style of lazy loading page
• Fixed an issue with lazy loading tabs closing on automatic updates

See more release notes
https://github.com/sienori/Tab-Session-Manager/releases

I was inspired by the following great add-ons, developed as an add-on for Firefox 57 or later.
Session Manager by Michael Kraft
http://sessionmanager.mozdev.org/index.html